Data sharing using Intent

Data sharing between Activities using Intent, When we create object for intent only we need to add some data to intent object and we need to read the data from targeted Activity, Following Example Explains How data sharing Takes place between Activities.

Step 1: Create New Application
Step 2: Write the following code in strings.xml

Strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Intent Sharing</string>

    <string name="main_button_cancel">Cancel</string>

    <string name="title_activity_second">Second Activity</string>

    <string name="main_button_submit">Submit</string>

    <string name="main_button_submit_hint">Please Enter User Name</string>

    <string name="main_button_cancel_hint">Please Enter Password</string>

</resources>

Step 3: Write the following code in activity_main.xml

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <EditText

        android:id="@+id/main_editText_usename"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:hint="@string/main_button_submit_hint" />

       

    <EditText

        android:id="@+id/main_editText_password"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/main_editText_usename"

        android:layout_below="@+id/main_editText_usename"

        android:layout_marginTop="20dp"

        android:hint="@string/main_button_cancel_hint"

        android:inputType="textPassword" />

    <Button

        android:id="@+id/main_button_submit"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/main_editText_password"

        android:layout_below="@+id/main_editText_password"

        android:layout_marginTop="23dp"

        android:text="@string/main_button_submit" />

    <Button

        android:id="@+id/main_button_cancel"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/main_button_submit"

        android:layout_alignBottom="@+id/main_button_submit"

        android:layout_centerHorizontal="true"

        android:text="@string/main_button_cancel" />

</RelativeLayout>

Step 4: Write the following code in MainActivity.java

MainActivity.java

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity {

       EditText edit_username, edit_password;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              Button button_submit = (Button) findViewById(R.id.main_button_submit);

              Button button_cancel = (Button) findViewById(R.id.main_button_cancel);

              edit_username = (EditText) findViewById(R.id.main_editText_usename);

              edit_password = (EditText) findViewById(R.id.main_editText_password);

              button_submit.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           String username = edit_username.getText().toString();

                           String password = edit_password.getText().toString();

                           Intent intent = new Intent(getApplicationContext(),

                                         SecondActivity.class);

                           intent.putExtra("username", username);

                           intent.putExtra("password", password);

                           startActivity(intent);

                           finish();

                     }

              });

              button_cancel.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           edit_username.setText("");

                           edit_password.setText("");

                     }

              });

       }

}

Step 4: Create new Activity (SecondActivity)

Step 5: Register SecondActivity in manifest file, add the following code in manifest.xml

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.swamy.intentsharing"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="18" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.swamy.intentsharing.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity

            android:name="com.swamy.intentsharing.SecondActivity"

            android:label="@string/title_activity_second" >

        </activity>

    </application>

</manifest>

Step 6: Write the following code in activity_second.xml

activity_second.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".SecondActivity" >

    <TextView

        android:id="@+id/second_textView_disp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

Step 7: Write the following code in SecondActivity.java

SecondActivity.java

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

public class SecondActivity extends Activity {

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_second);

              TextView editText_disp = (TextView)                                                          findViewById(R.id.second_textView_disp);

              Intent intent = getIntent();

              String username = intent.getStringExtra("username");

              String password = intent.getStringExtra("password");

              editText_disp.append("Username : " + username + "\n");

              editText_disp.append("Password : " + password);

       }

 }